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Subject: Chemistry, asked on 27/1/17

what is electron affinity ?

Subject: Chemistry, asked on 27/1/17

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Subject: Chemistry, asked on 27/1/17

explain effective nuclear charge and screening effect in terms of periods and groups 

Subject: Chemistry, asked on 4/1/17

d-block elements means the last e-should go in d-sub-shell.. so, why is the general configuration (N-10)d1-10 ns2 and, why it's that.. (written above)?!...

Subject: Chemistry, asked on 12/12/16

How should I use the aptitude while solving questions based on the trends of Periodic table.??

Subject: Chemistry, asked on 12/12/16

Explain the reasons for the trends in Basic characters And also tell how Basicity varies in the periodic table. Please do mention the exception case if there is so?

Subject: Chemistry, asked on 12/12/16

Explain the reasons for the trends in Oxidising characters And also tell how Oxidising characters varies in the periodic table. Please do mention the exception case if there is so?

Subject: Chemistry, asked on 12/12/16

Explain the reasons for the trends in Reducing characters And also tell how Reducing characters varies in the periodic table. Please do mention the exception case if there is so?

Subject: Chemistry, asked on 12/12/16

Explain the reasons for the trends in Acidic strengths And also tell how Acidic strengths varies in the periodic table. Please do mention the exception case if there is so?

Subject: Chemistry, asked on 12/12/16

Explain the reasons for the trends in chemical reactivity And also tell how chemical reacitvity varies in the periodic table. Please do mention the exception case if there is so?

Subject: Chemistry, asked on 12/12/16

Why can't the ionisation enthalpy of two different elements be the same?

Subject: Chemistry, asked on 12/12/16

Can there be same electron gain enthalpy for two atoms like ar and kr. ?? Why does Ar and Kr have same electron gain enthalpy?

Subject: Chemistry, asked on 12/12/16

Expers I am not able to arrange the elements or atoms or species in correct order from given set of options when it comes to me, and ask for ionization enthalpy, electron gain enthalpy, or electronegativity or any sort of other trend.
I have read the concepts of above topics thoroughly but still getting wrong answers.
What requisites I need, or what precautions I should take to have a better understanding and to get right answer in one go?

Subject: Chemistry, asked on 12/12/16

Explain and arrange the following in order of increasing radii, give the reasons
1) C,N , Si, P
2) O2- , N3- , S2- , F-

Subject: Chemistry, asked on 12/12/16

Which one of the following parirs would have a larger size ? explain
1) O2- or F-
2) P or As

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